Perhaps you should try some spelling variations:
"variables diffusivity excel coding program" » "variable diffusivity excel coding program" (Expand search), "variable diffusion excel coding program" (Expand search), "variables diffusivity excel cloning program" (Expand search), "variables diffusivity excel loading program" (Expand search), "variables diffusivity excel cooling programs" (Expand search), "variables diffusivity novel coding program" (Expand search)
"advanced python programming code program" » "advanced python programming model program" (Expand search), "advanced python programming models program" (Expand search), "advanced python programming course program" (Expand search), "advanced method programming code program" (Expand search), "advanced path programming code program" (Expand search), "advanced symphony programming code program" (Expand search), "advanced python programming code programs" (Expand search), "advanced python programming cove program" (Expand search), "advanced python programming coppe program" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("variables diffusivity excel coding program") OR ("advanced python programming code program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"variables diffusivity excel coding program\") OR (\"advanced python programming code program\"))".
• Removing quotes may allow a broader search: (( variables diffusivity excel coding program ) OR ( advanced python programming code program )).
• Adding a wildcard symbol may retrieve word variants: (("variables diffusivity excel coding program") OR ("advanced python programming code program"))*.